CN219183983U - Ultrasonic guide core - Google Patents

Abstract

The utility model relates to an ultrasonic guide core, which comprises a guide core body and an interception basket; the guide core body is provided with an ultrasonic transmitting section, and the ultrasonic transmitting section is close to the distal end of the guide core body; the interception basket is at least arranged at the far end of the ultrasonic emission section; the interception net basket comprises a self-expansion structure, and is in a net tubular shape or a net disc shape; the mesh density of the intercepting basket increases progressively from the proximal end to the distal end. According to the utility model, the fallen emboli can be intercepted in the ultrasonic thrombolysis process, so that the thrombus can be prevented from escaping to the distal end.

Description

Ultrasonic guide core

Technical Field

The utility model relates to the technical field of interventional medical instruments, in particular to an ultrasonic guide core.

Background

Thrombus is a small block of blood flow formed on the surface of the inside surface of a cardiovascular system vessel where it is exfoliated or repaired. In the variable fluid dependency (variable flow dependent patterns), the thrombus consists of insoluble fibrin, deposited platelets, accumulated white blood cells and entrapped red blood cells. If thrombus forms a blockage in the blood vessel of a human body, the blood flow is interrupted, myocardial infarction can occur when the thrombus is blocked in coronary arteries, cerebral infarction can occur when the thrombus is blocked in cerebral arteries, pulmonary embolism can occur when the thrombus is blocked in pulmonary arteries, limb infarction can occur when the thrombus is blocked in limb artery and vein, and the coronary artery are serious diseases and even endanger lives.

For thrombus treatment, the traditional treatment method mainly comprises a vascular cutting and thrombus removing operation, a vascular intima stripping operation, a venous thrombolysis operation and the like, wherein the vascular cutting and thrombus removing operation is required to be carried out by dissecting and cutting, and the vascular intima stripping operation is carried out after the cutting, so that the operation wound is very large; intravenous thrombolysis requires thrombolysis medicine to enter the whole body through the venous system, and has long thrombolysis time, high bleeding risk and low effect. With the development of intracavitary intervention technology and innovation of materials, the open operation mode is gradually replaced by minimally invasive intervention intracavitary treatment, including catheter thrombolysis, thrombus aspiration and the like, wherein the catheter thrombolysis can effectively dissolve thrombus, the method has been widely accepted and enters clinical guidelines, and thrombolytic catheters are placed in thrombus areas to directly perfuse thrombolytic drugs to achieve thrombolysis effect.

In order to reduce the dosage of thrombolytic drugs, improve the thrombolysis efficiency and effect, reduce the bleeding risk, the intravascular ultrasound thrombolysis technique increasingly attracts attention to treatment, and has good thrombolysis effect by utilizing the cavitation effect and the mechanical vibration effect of ultrasound, the thrombolysis effect can be achieved by adopting high-frequency ultrasound at present as far as the published utility model is concerned, but undissolved thrombus can be fallen off and flows to the far end due to the vibration and the movement of an ultrasound catheter in the thrombolysis process, so that thrombus escape is caused.

Based on the defects, how to improve the structure of the ultrasonic waveguide core, so that the ultrasonic waveguide core can prevent thrombus from escaping while dissolving thrombus, and the technical problem to be solved is urgent at present.

Disclosure of Invention

The utility model discloses an ultrasonic guide core which can prevent falling emboli from escaping to the distal end while carrying out ultrasonic thrombolysis.

The application provides an ultrasonic guide core, which comprises a guide core body and an interception basket;

the guide core body is provided with an ultrasonic transmitting section, and the ultrasonic transmitting section is close to the distal end of the guide core body;

the interception basket is at least arranged at the far end of the ultrasonic emission section; the interception net basket comprises a self-expansion structure, and is in a net tubular shape or a net disc shape; the mesh density of the intercepting basket increases progressively from the proximal end to the distal end.

As a preferable technical scheme, the far end of the interception net basket is fixed on the guide core body, the near end of the interception net basket is provided with an actuation wire, and the actuation wire is axially arranged along the guide core body; the intercepting basket is capable of collapsing radially under the control of an actuation wire.

As an optimal technical scheme, at least one locating piece is arranged between the actuating wire and the guide core body, two through holes are formed in the locating piece, the actuating wire and the guide core body are respectively arranged in the two through holes in a penetrating mode, and at least the actuating wire can slide in the through holes.

As a preferred solution, the positioning member is configured in a tubular or annular shape for preventing the actuation wire and the guide core body from being entangled and/or knotted with each other.

As a preferred technical scheme, the interception basket is provided with at least two sections with different grid densities; the distal section of the intercepting basket has a greater braid density than the proximal section;

and/or the distal section of the intercepting basket has a smaller mesh size than the proximal section;

and/or the distal section of the intercepting basket has a larger braided wire diameter than the proximal section.

As a preferable technical scheme, the far end of the guide core body is provided with at least two interception baskets which are in a net disc shape;

the far end of the interception basket arranged at the far end is fixed on the guide core body, the adjacent interception baskets are connected end to end, and the interception basket arranged at the near end is fixedly connected with the actuating wire.

As a preferred technical solution, the intercepting basket provided at the distal end has a greater knitting density than the intercepting basket provided at the proximal end;

and/or the intercepting basket disposed at the distal end has a smaller mesh size than the intercepting basket disposed at the proximal end;

and/or the intercepting basket disposed at the distal end has a larger braid wire diameter than the intercepting basket disposed at the proximal end;

and/or the intercepting basket disposed distally has a larger size than the intercepting basket disposed proximally.

As a preferred technical scheme, the grid density of each interception basket gradually increases from the respective proximal end to the distal end.

As a preferred technical scheme, the interception net basket comprises a shape memory alloy material; the interception basket comprises a laser cut metal basket or a woven metal basket.

As a preferred technical scheme, the ultrasonic transmitting section is provided with a plurality of ultrasonic transducers.

Compared with the prior art, the utility model has the advantages that:

the far end of the ultrasonic waveguide core is respectively provided with an ultrasonic emission section and an interception net basket, the ultrasonic emission end can generate cavitation effect and mechanical vibration effect so as to realize ultrasonic thrombolysis, the interception net basket is arranged at the far end of the ultrasonic emission section, one or more interception net baskets can be arranged at the far end of the interception net basket, the far end of the interception net basket is provided with grid density larger than that of the near end, thrombus falling off in the thrombolysis process can enter the interception net basket and be intercepted, after thrombolysis is finished, the interception net basket is controlled to radially shrink through an actuating piece so as to cover falling emboli, and the thrombus leaves a human body together with the ultrasonic waveguide core and the interception net basket, so that thrombus is prevented from escaping to the far end.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments are briefly described below to form a part of the present utility model, and the exemplary embodiments of the present utility model and the description thereof illustrate the present utility model and do not constitute undue limitations of the present utility model. In the drawings:

FIG. 1 is a perspective view of an ultrasonic waveguide according to a preferred embodiment of the present utility model disclosed in example 1;

FIG. 2 is a schematic view of the structure of an ultrasonic waveguide according to a preferred embodiment of the utility model disclosed in example 1;

FIG. 3 is a schematic view of the structure of an ultrasonic emission section in a preferred embodiment disclosed in example 1 of the present utility model;

fig. 4 is a perspective view of an ultrasonic waveguide according to a preferred embodiment of the present utility model disclosed in example 2.

Reference numerals illustrate:

the ultrasonic transducer comprises a guide core body 100, an ultrasonic transmitting section 110, an ultrasonic transducer 111, an electrode lead 120, a metal guide wire 130 and a coating layer 140; an intercepting basket 200, a mesh 210, a first section 220, a second section 230, a third section 240, an actuation wire 250, and a retainer 260.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. In the description of the present utility model, it should be noted that the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.

In the description of the present utility model, those skilled in the art will understand that the terms "proximal" and "distal" are relative to the operator unless explicitly specified and defined otherwise; the "proximal" is the one-dimensional direction defined by the human blood vessel that is closer to the user after the ultrasound catheter enters the human blood vessel, and the "distal" is the one-dimensional direction defined by the human blood vessel that is further from the user. And those skilled in the art will appreciate that the distance and near are not meant to be a straight line distance from the user's three-dimensional space.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model provides an ultrasonic guide core, which at least comprises a guide core body 100 and an interception basket 200; the guide core body 100 is provided with an ultrasonic transmitting section 110, and the ultrasonic transmitting section 110 is close to the distal end of the guide core body 100; the interception basket 200 is disposed at least at the distal end of the ultrasonic emission section 110; the intercepting basket 200 comprises a self-expanding structure, in the shape of a net tube or net disk; the density of the mesh 210 of the intercepting basket 200 increases progressively from the proximal end to the distal end.

Example 1

In the prior art, when an ultrasonic catheter is used for ultrasonic thrombolysis, undissolved thrombus can be fallen off due to vibration and movement, and can flow to the far end, so that the thrombus can escape. To this problem, this embodiment provides a novel ultrasonic wave and leads core, aims at solving the not enough that prior art exists, and ultrasonic wave leads the core and includes leading core body 100 and interception basket 200, leads core body 100 and can take place the supersound, intercepts basket 200 and can intercept the embolus that drops to prevent its escape.

Referring to fig. 1-3, in a preferred embodiment, the guide core body 100 includes a metal guide wire 130, an electrode lead 120, an ultrasonic transducer 111, and a cladding 140. Preferably, the guide core body 100 is further provided with an ultrasonic transmitting section 110, the ultrasonic transmitting section 110 being close to the distal end of the guide core body 100, and the ultrasonic transducer 111 being disposed in the ultrasonic transmitting section 110.

In a preferred embodiment, the ultrasonic transducer 111 is made of piezoelectric ceramics, in particular, may be axially stacked of several piezoelectric ceramics, and is connected to the electrode lead 120; preferably, 3 to 30 ultrasonic transducers 111 capable of converting an electric signal into a mechanical vibration signal to generate a sound field accelerating thrombolysis dispersion are uniformly arranged at the ultrasonic emission section 110.

In a preferred embodiment, the cladding layer 140 is made of a metal or a polymeric material; specifically, the polymer material may be selected from one or more of polyolefin such as ethylene, polypropylene, polyvinyl chloride, polyester (PET, PBT, etc.), polyamide, polyimide, polyurethane, polystyrene, polycarbonate, silicone resin, fluoropolymer (PTFE, ETFE, PFA, etc.), or composite material of these materials, latex rubber, silicone rubber, or nylon elastomer. Specifically, the metal material may be a stainless steel material.

Preferably, the metal wire 130 disposed in the ultrasonic waveguide core is also made of a stainless steel material, such as one of SUS304, SUS303, SUS316L, SUS J1, SUS316J 1L, SUS, SUS430, SUS434, SUS444, SUS429, SUS430F, or SUS302, for providing the ultrasonic waveguide core with a higher axial structural strength.

In a preferred embodiment, the distal end of the ultrasound catheter is further provided with a contact probe, preferably configured as a spring for providing contact feedback.

In a preferred embodiment, the ultrasonic waveguide core is energized by an ultrasonic generator, and the core body 100 is connected to the proximal end of the electrode lead 120; preferably, the frequency of the ultrasonic generator is 20-50 KHz, and the energy is 0-1W.

It will be appreciated by those skilled in the art that since the vessel inner diameter and thrombus size vary from patient to patient, the dimensions of the guide core body 100 and/or the ultrasound transmission section 110 can be adapted to the patient's condition and are not limited herein.

As shown in fig. 1 and 2, alternatively, the interception basket 200 is disposed at the distal end of the ultrasonic emission section 110 or disposed outside the ultrasonic emission section 110, and the interception basket 200 has a self-expanding structure and is in a shape of a net tube or a net disc.

Preferably, the interception basket 200 is made of a shape memory alloy, such as a nickel-titanium alloy memory material or other memory polymer material or alloy, and in this embodiment, a plurality of interconnected grids 210 are formed by processing the nickel-titanium alloy memory material or the like; optionally, the above-mentioned processing means include, but are not limited to, braiding, laser cutting, welding, rivet connection, screw connection, and the like.

It will be appreciated by those skilled in the art that shape memory alloy materials have a memory effect and are capable of collapsing radially at low temperatures after being formed into a mesh tubular or disc-like structure in vitro, and undergo radial self-expansion with increasing temperature after entering the body and release, with some elasticity.

In a preferred embodiment, when the interception basket 200 is disposed at the ultrasonic emission section 110, the interception basket 200 swells 5 to cut thrombus and then is matched with ultrasonic thrombolysis so as to achieve higher thrombolysis efficiency; preferably, interception is performed at this time

Basket 200 has a relatively sparse mesh 210 at least at the proximal end to ensure insertion and cutting of thrombus; while the distal end of the intercepting basket 200 has a denser mesh 210 to avoid emboli escaping from the intercepting basket 200.

In another preferred embodiment, an intercepting basket 200 is disposed distally of the ultrasound emitting section 110 and the intercepting basket

200 increases progressively in density from the proximal end to the distal end. The proximal larger mesh 210 allows thrombus to penetrate into the barrier mesh 0 basket 200 wherein the distal smaller mesh 210 prevents thrombus from penetrating to the effect of avoiding thrombus escaping distally.

In a preferred embodiment, the distal end of the interception basket 200 is fixed to the guide core body 100, and the proximal end is in a ring shape and slidably connected with the ultrasonic guide core; preferably, the proximal end of the intercepting basket 200 is provided with an actuator extending proximally along the axial direction of the guide core body 100 for controlling the radial collapse of the intercepting basket 200.

Preferably, as the interception basket 200 is wrapped in the outer sheath tube or the delivery catheter or the drug delivery catheter during in-vivo delivery, the 5 is subjected to circumferential limitation and can keep a radially contracted state, when the limitation of the outer periphery of the interception basket 200 is removed, the interception basket can convert axial pressure into radial expansion force, thereby realizing self-expansion and gradually expanding to a size matched with the inner diameter of a blood vessel, so as to realize interception of fallen emboli and avoid the emboli from escaping from a gap between the interception basket 200 and the blood vessel wall; when thrombolysis is completed, the actuating member is retracted proximally, the distance between the proximal and distal ends of the intercepting basket 200 is stretched to achieve radial retraction of the device, which

The mesh 210 becomes smaller in size due to the radial contraction of the intercepting basket 200 and the density of the mesh 210 becomes greater to completely cover the thrombus 0 therein. It will be appreciated by those skilled in the art that the distance between the proximal and distal ends of the intercepting basket 200 is generally inversely related to the diameter of the intercepting basket 200.

Preferably, since the diseased site of the same patient or different patients is different, the vessel inner diameter and thrombus volume are different, and it can be understood that the size of the interception basket 200 can be freely decided according to the actual physiological state of the patient, which is not described herein.

5 in a preferred embodiment, the actuator is an actuator wire 250, the actuator wire 250 being disposed axially of the core body 100

Alternatively, radial contraction of the intercepting basket 200 can be achieved when the actuation wire 250 is retracted proximally.

It will be appreciated by those skilled in the art that due to the complex anatomy of veins and arteries in the human body, even a single guidewire is susceptible to kinking and twisting during interventional procedures, and more susceptible when multiple guidewire structures are required

Knotting. Based on the above, in a more preferred embodiment, at least one positioning member 260 is provided between the actuation wire 250 and the guide core body 100, and the positioning member 260 is tubular, cylindrical or adapted to the shape of the actuation wire 250 and the guide core body 100; fixing device

The positioning element 260 is provided with two through holes, the actuation wire 250 and the guide core body 100 are respectively arranged in the two through holes in a penetrating way, at least the actuation wire 250 can slide in the through holes, and the positioning element 260 can prevent the actuation wire 250 and the guide core body 100 from being wound and/or knotted in a human body.

In one aspect, the actuator is configured as an actuator wire 250 that controls the volume of the entire ultrasound waveguide core to facilitate advancement in a blood vessel

Conveying in rows; in the second aspect, after the positioning member 260 is added, the usability and safety of the actuation wire 250 are significantly improved, and 5, the situation that the actuation wire 250 is folded and wound with the guide core body 100 and the operation fails is avoided; in a third aspect, will

The actuating member is arranged in a linear shape rather than in a tubular shape sleeved outside the guide core body 100, and can avoid the ultrasonic wave shielding caused by the actuating member, so that thrombolysis failure is caused.

As shown in fig. 2, preferably, the intercepting basket 200 is provided with at least two sections having different densities of the meshes 210; preferably, the method comprises the steps of,

the interception basket 200 comprises a first section 220, a second section 230 and a third section 240, wherein the first section 220 is arranged at the proximal end of the interception basket 200, the third section 240 is arranged at the distal end of the interception basket 200, and the second section 230 is arranged at the first section

Between the segment 220 and the third segment 240.

In a preferred embodiment, the distal section of the intercepting basket 200 has a greater braid density than the proximal section; preferably, the first section 220 has a relatively sparse weave density, the third section 240 has a maximum weave density, and the second section 230 has a weave density intermediate the two.

5 preferably, the weave density of the third section 240 satisfies: the thrombus is prevented from escaping and the blood flow is not blocked. To ensure that in

The thrombus is removed without causing excessive blood loss.

In another preferred embodiment, the distal section of the intercepting basket 200 has a smaller mesh 210 size than the proximal section; preferably, the mesh 210 of the first section 220 is larger in size to accommodate thrombus inflow, and the mesh of the third section 240

210 is of minimum size, avoiding thrombus outflow, and the mesh 210 of the second section 230 is of a size intermediate the two.

0 preferably, the mesh 210 size of the third section 240 satisfies: the thrombus is prevented from escaping and the blood flow is not blocked.

In another preferred embodiment, the distal section of the intercepting basket 200 has a thicker braided wire diameter than the proximal section; preferably, the braided filaments of the first section 220 are thin, so that the mesh 210 is large in size and the mesh 210 is sparse, and the braided filaments of the third section 240 are thick, so that the mesh 210 is small in size and the mesh 210 is dense, and the braided filaments of the second section 230 have a diameter in between.

5 it should be noted that, although the intercepting basket 200 is divided into a plurality of sections, adjacent sections are gradually transited,

so as to ensure the structural integrity and structural strength.

In this embodiment, the above-mentioned ultrasonic guide core can be used in cooperation with a drug delivery catheter or the like, so as to perform drug thrombolysis while performing ultrasonic thrombolysis, thereby improving thrombolysis efficiency.

Example 2

0 in this embodiment, an ultrasonic guide core is provided, which comprises a guide core body 100 and an interception basket 200, wherein

The features concerning the guide core body 100, which are included in embodiment 1 described above, are naturally inherited in this embodiment.

In a preferred embodiment, as shown in fig. 4, at least two intercepting baskets 200 are provided at the distal end of the guide core body 100, preferably, the intercepting baskets 200 are disc-shaped and are sequentially provided in the axial direction of the guide core body 100, and by arranging the intercepting baskets 200 in a disc shape, the total length of the axial arrangement of the plurality of intercepting baskets 200 can be controlled.

In a preferred embodiment, the distal end of the interception basket 200 disposed at the distal end is fixed on the guide core body 100, the adjacent interception baskets 200 are connected end to end, and the interception basket 200 disposed at the proximal end is slidably connected with the guide core body 100 and fixedly connected with the actuating member, and by retracting the actuating member, a plurality of interception baskets 200 can be radially collapsed at the same time.

In a preferred embodiment, the actuating member is an actuating wire 250, and adjacent intercepting baskets 200 are fixedly connected end to end, or adjacent intercepting baskets 200 are connected by actuating wires 250.

Preferably, at least one positioning member 260 is disposed between the actuation wire 250 and the guide core body 100, two through holes are disposed in the positioning member 260, the actuation wire 250 and the guide core body 100 are respectively disposed in the two through holes, at least the actuation wire 250 can slide in the through holes, and the positioning member 260 can prevent the actuation wire 250 and the guide core body 100 from winding and/or knotting in the human body.

In this embodiment, the arrangement of the actuation wire 250 is the same as that of embodiment 1 described above, and will not be described again.

In a preferred embodiment, the mesh 210 density of each intercepting basket 200 increases progressively from the respective proximal end to the distal end; specifically, each intercepting basket 200 may adopt any of the schemes described in embodiment 1, and will not be described herein. At this time, the thrombus fallen off during the ultrasonic thrombolysis process may penetrate into and be caught by the first interception basket 200, and if fallen off, may continue to penetrate into the second interception basket 200 to intercept it there, and so on, until the fallen off thrombus is intercepted by the most distal interception basket 200.

In one embodiment, the distally disposed intercepting basket 200 has a greater braid density than the proximally disposed intercepting basket 200; preferably, the interception basket 200 arranged at the proximal end has sparse knitting density, so that the fallen emboli can be intercepted preliminarily; the interception basket 200 disposed at the distal end has the greatest weaving density for further capturing the detached thrombus not captured by the interception basket 200 at the proximal end, thereby playing a double-securing role. More preferably, the knitted density of the intercepting basket 200 disposed at the most distal end should be such that: the thrombus is prevented from escaping and the blood flow is not blocked. So as to ensure that excessive blood loss is not caused while the thrombus is taken.

In a preferred embodiment, the distally disposed intercepting basket 200 has a smaller mesh 210 size than the proximally disposed intercepting basket 200.

In a preferred embodiment, the distally disposed intercepting basket 200 has a larger braided wire diameter than the proximally disposed intercepting basket 200.

More preferably, whichever of the above embodiments is employed, the density of the mesh 210 of the first proximally disposed intercepting basket 200 increases progressively from the proximal end to the distal end; that is, the first intercepting basket 200 can independently accomplish a part of the intercepting effect, and if not all the intercepting baskets 200 disposed at a more remote end can intercept again.

More preferably, regardless of the embodiment described above, the distally disposed intercepting basket 200 has a larger size or diameter than the proximally disposed intercepting basket 200 and has a smaller mesh 210 size than the proximally disposed intercepting basket 200, at least to ensure complete apposition to the inner wall of the vessel after complete expansion and complete capture of emboli not captured by the proximally disposed intercepting basket 200 for superior thrombus escape prevention.

The embodiments of the present utility model have been described above with reference to the accompanying drawings, but the present utility model is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are to be protected by the present utility model.

Claims (10)

1. An ultrasonic guide core is characterized by comprising a guide core body and an interception basket;

the guide core body is provided with an ultrasonic transmitting section, and the ultrasonic transmitting section is close to the far end of the guide core body;

the interception basket is at least arranged at the far end of the ultrasonic emission section; the interception basket comprises a self-expansion structure, and is shaped like a net tube or a net disk; the mesh density of the interception net basket gradually increases from the proximal end to the distal end.

2. The ultrasonic waveguide core according to claim 1, wherein the distal end of the interception basket is fixed on the waveguide core body, and the proximal end of the interception basket is provided with an actuation wire, and the actuation wire is axially arranged along the waveguide core body; the intercepting basket is radially collapsible under the control of the actuation wire.

3. The ultrasonic waveguide according to claim 2, wherein at least one positioning member is provided between the actuation wire and the waveguide body, two through holes are provided in the positioning member, the actuation wire and the waveguide body are respectively provided in the two through holes, and at least the actuation wire is capable of sliding in the through holes.

4. An ultrasonic waveguide according to claim 3, wherein the positioning member is configured in a tubular or annular shape for preventing the actuation wire and the waveguide body from being entangled and/or knotted with each other.

5. The ultrasonic waveguide core of claim 4, wherein the intercepting basket is provided with at least two sections having different mesh densities; the distal section of the intercepting basket has a greater braid density than the proximal section;

and/or the distal section of the intercepting basket has a smaller mesh size than the proximal section;

and/or the distal section of the intercepting basket has a larger braided wire diameter than the proximal section.

6. The ultrasonic waveguide core according to claim 4, wherein the distal end of the waveguide core body is provided with at least two interception baskets, each of which has a net disc shape;

the far end of the interception basket arranged at the far end is fixed on the guide core body, the adjacent interception baskets are connected end to end, and the interception basket arranged at the near end is fixedly connected with the actuating wire.

7. The ultrasonic waveguide core of claim 6, wherein the interception basket disposed at the distal end has a greater braid density than the interception basket disposed at the proximal end;

and/or the intercepting basket disposed at the distal end has a smaller mesh size than the intercepting basket disposed at the proximal end;

and/or the intercepting basket disposed at the distal end has a larger braid wire diameter than the intercepting basket disposed at the proximal end;

and/or the intercepting basket disposed at the distal end has a larger size than the intercepting basket disposed at the proximal end.

8. The ultrasonic waveguide of claim 7, wherein the mesh density of each of the intercepting baskets increases progressively from the respective proximal end to the distal end.

9. The ultrasonic waveguide core of claim 1, wherein the interception basket comprises a shape memory alloy material; the interception basket comprises a laser cut metal basket or a woven metal basket.

10. The ultrasonic waveguide core of claim 1, wherein the ultrasonic transmission section is provided with a plurality of ultrasonic transducers.

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